Max von foesteb



(No Model.) I 1 M. VON FORSTER.

SHELL.

Patented'Deo. 22, 1885.-

No. 333,091. r

' jectile embodying my improvements; Fig.

UNITED STATES MAX VON EoR-sTER, OF BERLIN, GERMANY.

SHELL.

PATENT OFFICE.

SPECIFICATION forming part of Letters Patent 120. 333,091. dated December 22, 1885.

Application filed July I, IBEEPSMJSQHQSQ. (No mpdel.)

To all whom it may concern.-

Be it known that I, MAX voN FoRsTER, a subject of the King of Prussia, residing at Berlin, Germany, have invented certain Im; provements in Projectiles, of which the following is a specification.

contents of the projectile in parafiine 'or equivalent material, which is poured in in a liquid state and solidifies around the grainsot' the explosive, as fully described herein after.

a sectional view of the upper end of a pro- 2 is a plan view of the priming-cartridge detached. Fig. 3 is a sectional view of a modification, and Fig. 4 is ,a plan'view ,er the same.

Referring to Fig. 1, (1 represents the walls of the projectile, which has at its point an opening or mouth for the iutfodution of the explosive material of tlre,cartridge, and for the reception of the,.fuse c. The explosive substance, e, in sufficiently small granular form, is introduced throughthe opening or mouth of the projectile until the latter is nearly filled. A-"cylinder, b, made of a compressed mass of the same or of another explosive substance which will produce a detonation of the explosive material e, and serves for a priming-cartridge, is now introduced into the hollow projectile. A space is left around the upper edge of the cartridge, and liquid paraffine' is then poured into the hollow projectile. The parafiinc fills up all the cavities between the several grains of the explosive substance, and between these grains and the walls d of the projectile it hardens quickly and converts the whole charge into a rigid solid body. 1

Instead of I introducing the priming-cartridge before pouring in the parafline, acylinder made of any other solid material-of metal, for instance-may previously be introduced,

In the accompanying drawings, Figuret'l is? the parafli'ne filled in, and the cylinder may then be taken out after the parafline has hardened. A hollow space is thus formed for the reception of the priming-cartridge.

Within the priming-cartridge b is the usual copper cap, a, which consists of a tube closed -at one end andppen at the other, and filled in part with fulminating mercury.

The mouth of the projectile above the priming-carti'idge is closed by the fuse c, the open end (if the cap a being toward the fuse. The

"priming-cartridge is exploded by' the flame from the fuse in the usual manner.

In Figs. 3 and 4 I have illustrated a modified form of priming cartridge or cap, the

in the usual manner.

Instead of using paraffine to solidify the explosive, wax may be employed, or a mixture of wax ahd parafiine, or solid distilled fatty acids as, for instance, palmitic acid, inorganic acid, stcaric acid, or any equivalent substance which does not prevent the transfer of the detonation from one particle of the explosive substance to another.

When porous explosive substances are employed, I protect the grains of the explosive material and also the priming-cartridge by a coating against the entrance of the paraifine, so far as is necessary to maintain its explosive character. In nitrated cellulosesuch as guncotton, for instance-this coating may easily be obtained by dipping the pieces into a solvent of the nitrocellulose. Where ordinary black powder is employed,a coating is not necessary.

If the priming-cartridge is made of nitrocellulose, and the fluid which dissolves the nitro-cellulose is poured into the projectile,

'the copper cap will be placedtherein while tn; dissolved parts of the wall are still wet, so that the cap will be fixed in the primingcartridge as soon as the latter becomes dry.

I claim asmy invention-- 1. A hollow projectile having its explosive contents embedded in parafline or equivalent havingaprotective coating to prevent the enmaterial to form the whole of said contents trance of the parafline or equivalent into the into a solid mass. same, substantially as described.

2. A hollow projectile having a granular In testimony whereof I have signed my name 5 explosive and a priming-cartridge both einto this specification, in the presenceqf two subbedded in paraffine or equivalent material to lseribing witnesses, June 17, 1885. form the whole contents of said projectileinto MAY VON FORQTER a solid mass; i

3. A hollow projectile containing aporous ex- Witnesses: IO plosive having its granular contents embedded l. WLM. GOLDENBEN in paraifine or equivalent material, the grains CHAS. R. HOYT. 

